ABSTRACT
Vanadium-based compounds, with four oxidation states (V5+, V4+, V3+, V2+) and many different crystal phases, are one of the most intensively studied material systems for supercapacitor application, owing to their easily tailored morphologies, structures and electronic properties, as well as their large pseudocapacitance. In this chapter, we will summarize the physicochemical features and highlight electrochemical studies of vanadium-based oxides, nitrides, and other compounds as pseudocapacitive electrode materials. A variety of methods of improving their conductivity and stability by nanostructure engineering and incorporating with different nanocarbon materials will be particularly emphasized throughout this chapter.
